Are the lithium batteries sold with lights safe/UV light discussion

What’s wrong with it?

According to GhostJoe

Yes, I know. There’s always a bigger fish.

I don’t own this light, but Wurkkos updated the LED to 365nm. From the pictures I’ve seen it’s ok. Might not be as powerful as the S2+, which I own, but seriously, the Convoy is brutally bright. Without eye protection, I get headache within 10 seconds.

Then you’ve clearly missed my posts on them.

While they aren’t dangerous and work okay, the QC could be better. Received 100pcs 18650 with spot welded button tops barely welded on causing very poor performance. Then a batch of rusty 14500’s I had to bin. Reported to Sofirn who never bothered to respond or offer compensation…I bought 200 of them :confused:

I’m a dealer for Sofirn, but refuse to bundle their batteries. I rate all flashlights in my store with my own tested lumens, and I like to bundle a battery that achieves my lumen result. I find it a bit deceiving advertising a model at 3000 lumens and then bundling a battery that can only output 2000. This is the case with Sofirn’s batteries

The re-wrapped PLB 26650 Sofirn now sell is very decent though. I had been using this model way before Sofirn got their hands on them

Nah, I bet his S2+ had a ZWB2 filter installed which filters out non 365nm light. Makes a world of difference

I have been meaning to look into a filter.
I ordered the WK30 yesterday and they shipped it today so i should get it in 1-2 months. Is it a good UV emitter?

I don’t know what filter to look for or where to buy it (being in Canada).

No, I compared WK30 with S2+ w/o ZWB2 filter and found huge difference

Doubt you’d be able to find a filter for the WK30 with how it’s designed without blocking out the other two emitters.

I used to use the same LED in the S2+ which was fine, but every LED looks kind of useless without the filter installed.

The WK30 used to use a 395nm version, can you confirm whether it was the new 365nm?

Initially I have the same intention like you - ordered wk30 as my only uv light as I thought I won’t use it often. After playing around for a few days I felt unsatisfied and then ordered S2. I think it is still a good uv light, but saw huge difference after testing both in bathroom. After that I ordered ZWB filter for S2 (you cannot add zwb filter for wk30). The wk30 I received obviously has a different emitter than pictures posted on wk30 review threads here but I later found it is the exact same one used in sofirn sp31uv (no surprise) so believe it is still a 365nm emitter. The S2+ Nichia 365 I bought is the upgraded version with 7135x3 and Zeroair has a test review on it. To be frankly, I think you will eventually buy a S2+ if you are interested in a uv light. I actually like wk30 - it is a good light, 351 emitter has very neutral white light w/o any noticeable green tint. It is also very floody and red light is a big plus.

Yes I believe it is a 365nm emitter, 395nm emitter has lots more visible light and all 2021 wk30s should be 365nm (mine was manufactured in early 2021 according to serial no ). The one I received has the same emitter in sp31uv tested by davestechreviews, but it is different from wk30 review thread posted on BLF.

Yeah these DLG 18650 batteries are dirty cheap so I guess it is the reason why sofirn re-wrapped them. I do see a few has high internal resistance on my vapcell s4+ so obviously QC could be an issue. Other Chinese branded cells like LISHEN have the similar issue. I remember seeing a report saying that the QC failure rate of these Chinese cells is much higher comparing with major brands.

Resistance is never accurate on a charger though, you’d need something like this

I found the Sofirn 21700 5000mAh (Lishen LR2170SD) to be excellent, I reviewed it here I ended up purchasing 100pcs of these from 18650batterystore.

Can’t really expect China cells to match the same QC when they’re priced so much cheaper. They’re decent for what they are, I just wish Sofirn gave the option to bundle Samsung, Panasonic etc.

The older 395nm LED did have visible light “leakage”, but it was bluish/purplish, not too obtrusive.

The newer 365nm LED, which I don’t have in the WK30, but presumably in the SP31UV, which I do have, has an eerie greenish tint to its visible leakage.

The ’31 is a nice UV thrower if you want to spot scorpions, etc., before they’re actually crawling all over you, but it’s in desperate need of a ZWB2 filter. My old/original WK30 is perfectly usable without any filter.

That said, the UV S2+ with ZWB2 filter is the sangraal of UV lights.

Bah, nobody would tell me this before i bought the wrong light…

Ummm, did you ask? :stuck_out_tongue:

You’ll be happy with the ’30.

Yes, it was highly recommended

There’s a couple posts on the first page recommending the Convoy S2 UV with the ZWB2 filter

Indeed, i didn’t know until this thread that it was a better UV chip, just that it was another option.
Can that filter be bought as a large piece i can put over the light for the WK30?

While the Nichia LED is better than the LG, the massive difference is the filter

Convoy sell the C8+ with a large filter so perhaps you can ask Simon if you can purchase separately